Speed-indicator.



o. BOTHB @E o. LSGHER.

SPEED INDICATOR.

APPLICATION FILED 151017.23, 1909,

1,001,342, Patented Aug. 22,1911.

ATH] RN EYS.

f v Y 'sinEn-innicaroa.

To @ZZ-,whom 'tfmcy concern.'

Beit knoiv'n thatv We, OrToBoTi-in, me-

" `chanieal engineer, a subject of the German `Enipero-r., residing at 2 Aekerstrasse, Berjlin, Germany, and O'r'ro Lsoi-inii, clerk, a subjectlof the German Emperor, residing at 20. Ackerstrasse, Berlin, Germany, have invented certain new and useful Improvements in Speed-Indicators; and We do hereby declare the following to be a full, clear,

exact description of the invention, such as; will enable others skilled in the art to which it appertains to make and use' the same. p

This invention relates to improvements in speed indicators, and more particularly to in'ipro'vements in that class of indicators in -Which the indicatin' device such as an infldica-ting finger or pointer, is set by means 2,0

of a plurality of setting elements which are successively connected With the object the speed of which is to be ascertained. 'When using; suoli indicators for indicating the speed forniotor cars. it is necessary, in order to obtain more rapid and accordingly more correct indications, to make such measurements by means of the setting elements very frequently, because the speed of such motor cars is subgected to rapid changes.

' consistsiof the' matters escrbedh'ereinaftei" The object of the improvements is to prov vide a speed indicator of the class described inxwhich such frequent measurements by means of the setting elements are made Without reducing the time of cooperation of 35/ the individual setting elements' with the shaft of the motor car,'and Without increasing"the speed of the setting elements, While at the saine time one of the setting elements is always in position to hold the indicating device or pointer in its set position.

With this object in view the invention and particularly pointed out in lthe appended claims.

For the purpose of explaining the invention an example embodying the saine has been'shovvn in the accompanying drawing, in whichY thefsame lnumerals of references y have been(` used in all the views "to indicate Acorresponding parts.' ,l Iii-said drawing Figure 1, is a diagram lillu''strating the coperation of the setting elements of the apparatus illustrated in E'Figs. 2 to 4 `vvithe'ach other, with the pointer of"l the "indicator, and With the shaft the' speed of Which is to be ascertained, Fig. 2,

Specification of Letters Patent.

erro Borna Ann o'rfio Lser-inn, or BERLIN, GERMANY.

Patented aan. 22. 1911.

i .Application filed November 23, 1909. Serial No. 529,62] l lcross-section of F ig. 2 taken on the line A--B,

and Fig. 4, is a horizontal cross-sectionl of the apparatus taken on the line C-D of Fig. 2.

In the example illustrated four setting elements are provided which are adapted to be successively coupled to the shaft the speed of which is to be measured. For the sake of convenience the latter Will be termed the driving shaft or the driving element in the following vdescription and inthe claims. As shown in the drawing, a pair of rotary shafts 1, l are loosely mounted in the Walls of the casing ofthe' apparatus, and the said shafts are operatively connected with the said driving shaft, the connection being such that bot-h shafts l, l rotate in the same directioii. Each of the said shafts carries a ratchet disk 2, 2 Which is rigidly secured thereto, so that it partakes of the rotation of the shaft. On both faces, the disks 2, 2 are formed with ratchet teeth. Loosely mounted on each of the shafts l, lthere are a pair of longitudinally slidable ratchet disksl 3, 3 which are adapted tobe successively coupled to the shafts l, l and to be rotated thereby by the engagement of their ratchet teeth With the teeth provided on the disks 2, 2. The ratchet disks 3, 3 the number of which in the example is four, are controlled by levers 4, l Which are adapted to be rocked by cam disks 5, rigidly se# cured to a shaft 6. The latter is mounted in the Walls of the casing and it is adapted to be uniformly rotated by means of a suitable cleck mechanism (not shown in the` drawing). By "ieans of the said Cain disks the four ratchet disks 3 are successively coupled to the disks2and the shafts i. Rig-idly secured toreach of thel ratchet disks 3 is a spur gear 7 which is in mesh With a Irotary spur gear 8. A. spring 8 tends'to rotate the latter in opposition to the rotary movement imparted tothe spur gear-bythe gear 7. The spur gears 8, 8 are arranged in pairs, and the gears of each pair are adapted to act on the saine spur gear 1l and to` advance the same by means of pins 9, 9 projecting laterally from the spur'g'e ars 8,8 and 1l, and the spur gear -11 is in mesh with a1 spur gear 1l mounted on the arbor l0 of the speed indicating pointer. A spring 10 tends to turn the arbor l0 and the spur gear ll in lopposition to the 'rotaryj 'movement imparted thereto by the spur gear il. By

the ooinbinei notion of tiie spring; i0 and the spur gear il successively fitted upon by the disks i3 the indicating' pointer is sel' so t f .Y ,"-l 1\ 11. VI es to indicate the si t oi (in: smiths nim the driving; stief ti i erewii ii.

a'wis 14 are breves 'xviiieii turn loosely on the sbatte 163, two oi which pa'wis are piti seperated the proper po other by spacing eoiiai's The sleeve 15 oi? eee-b. .n wi 14 is .:roviiled :it opposite end with :i porvi 14 which engages s rete-bet Wiieei i2. Springs if? 'pi into eng`- ement with the ratchet w While the iei/'ers 14 :1re adjacent to the d isii's lf3 and ere actuated by the seine.

Wbei'iewer one oi' tbe .ratchet disks has been Coupled with it eba'ft 1 so :is to tieneH mit the rotary motion ot' the letter to tbe cooperating disk lli. and through tti-e letter to the arbor 10 of the indicating pointer, it is again disconnected :from its shaft l by means of its lever Il oontroiled by the shaft 6. To prevent tbe gearing 7, 8, l1, ll" and the'erbor l0 'from beine turned backward by the springs l)vr :ind 87 the disk 3 is ternporarily looked ineens of t ie pewi 11i" and. the ratchet disk l2 seonrezfi to the s "ir gear '7. The pe'wl is thrown into engage ment. 'with the ratchet disk 12 es soon es the disk 3 is thrown out of engagement 'with the .ion from exit-ii disk 2s t'orwbiei'i purpJsi e earn disk 'i3 yis secured to tbe shaft (i. the gearing 77 8, li.

.is not re..

ised from the ioeking pziwi 141-",

so as to e moved into its inoperative posinieoiieniern 3.2, le.

The operation of the apparatus as tot lows: the setting element. EH hns been coupied to the shaft the speed et which to be ascertained, tbe eieinenti 'which before was coupled to the seid shaft is disconi from the shaft i and heid in looking position by its perd 1.4L', so that the shaft l() een not be thrown beek-.iard by its spri 10C inniit-xneousiy the setting element V wbien so fer bes been in its ioeiring `position is entirelyreleesed by its paw'i 14:@ so that it is shifted by its spring 8 into its initial positionj While the arbor of the indioating pointer heid in position by the element I. The reietivepaths the tour setting` elements sire illustrated in Fi*4 i. in which tbe ordinates ind'czite tbe paths ot' l the said elements and the obs-eisste the time The diagram o'f' tite ele shown in tuti 'iines indi merit, after pas e 3d on the seine shaft and :lire u more@ ini-euvel bes just been coupled to its .shaft i., so that it is rotated, and its diagram rises troni the zero iine. The element has just performed its operative stroke, endithes zum rived in 'its looked position, and the element H which before has been Coupled to its shaft Vi ties passed one iiziit of its sti'oke, and it enriins in e n .'einent with the'siiott 'i for remaining boit of its operafis soon as it arrives at tbe operative stroke, the operation of eneiiis is ei if, by reason ot o feed of the driving shaft i v.ie of tbe setting elements (in tl the parte referred to., the d nent ifi), is not advzmoed to the same ei'- t iis the previously operative element (I) which is ii" iding the arbor l0 in position, the hitter Wiii be turned backward accord nn'ilii it eonios into engagement with :peratiw .lenient il). And it tbe speed oit the snntt is increased, the operar tive element ti .J sniifts the said arbor l0 forward.

` As the time during which eooi'i set-ting eienient is operative is constant (the control ling shaft 6 being continuously driven by a clock nfieehanism), the extent oi the rotation oit the said element .is o, measure for the speed ot the shaft l, and the said rotation indie-ated by the pointer ot the 'indicating arbor 1G.

Bu' the mrs*- eii'ient described "e inensureinents in be 'tokein And .this 0""'ieted b," metri the period or' time dur and the period o5 time they are 'in their inoperf.

during which tbe s:

to 'die diz,l

{"I tive end iii-their ioekinff halt' of tin the seid are conix dririrf Under these fooi 1 ien in order to provide e constant sul o or the indicating pointerf1 is appears from the dingrain. And :trein the said four setting eiements resuit :in increase in the number of the measurements o tbe speed, and thereffore more ziceurete results.

Having now per?.itiiiztrij7 described and [ned the nature et our said invention t Vi 'what mein termed, we decisi:

l., In a speer with the indioiii'ing erbor i eioments adapted to lbe inem. *y the digit l i -if eiein nt the speed of Wh. is to be es eert-iiined and to the indio-ating element, ineens te eonjgte seid setting arbor snoees ei'veiy end .ing iike periods time to 'n their i'iuiiijnfiii-- "ia'isitions ere one which to the ees ' iei ments 'n'ter than the perii'id of' tiril i giitfi actuated 'clutcliesi spur gears on the said driving element, locking:l means for l'each of said setting elements operative when `uncoupling the same from the driving element, and means-to unlock said settingelements, the operations of coupling, locking and releasing` said settin'g'elements succeed- ,ing one another in 'su'ch a way, that when coupling one-setting element with the driving shaft a previouslylocked element is ive- A leasedto move Ainto itsfinoperativeposition, and4 a prevrously,coupled-element has to complete one half Vof its stroke, lwhile the setting element -which has been coupled before the'elernent completing its stroke is locked inits rposition.

2. In a speed indicator 'the combination of`-.two.clutch shafts .adapted torotate in ,he same-direction in connection `with the shaft AWhose speed'is' to be registered, double clutches on said shafts respectively, a clockactuated intermediate shaft, cams on said intermediate4 shaft, shifting levers engaged by said cams for ylo'ckingiand releasing said clutches, spur: gears ori-the sleeves ofthe sliding'clutchmembers, .an indicating` ar-f. -`bor, 4and spring. jtensioned mechanisms between Said 'Spur gears and said indicating arboinig l v a.. ,In a speed-indiener the :termination of' .two lfrotary'ff-shafts adaptedto rotate in the 'same Adirect-ion in'connec'tion with the shaft Speed to be registered, double clutches on, said shaftsl respectively, aclock- Y' termediate shaft, y,cams gin-said intermediateslia-ft, shifting levers engaged by said'fcams for locking and releasing said' sliding clutch members, intermittent locking mechanisms for said spur gears, an indicating arbor', and spring tensionedv mechanisms between said spur gears and said iiidicating arbor.

4. In a speed indicator' the combination of tworotary shafts adapted to rotate .in

the same direction in .conn tion with the shaft 4whose Vspeed is to be registered, double clutches on said shaftsrespectively, a clockactuated intermediate shaft, cams on said intermediate shaft, shifting levers engaged by said cams for locking and releasing said ciutches, spur on et sleeves ofthe' slidingclutch members, intermittent locking j mechanisms for said spur gears, consisting of ratchet disks ixed to said 'spur gears, pawls engaging said ratchet disks andy cams on said intermediate shaft for actuatingsaid pawls at properintervals, an indicatingv arbor, and spring'tensioned mechanismsl be.-

tween said spur lgears and said indicating arbor. 5, In a speed indicatorthe .combination of t'wo clutch shafts adapted to rotate mtliesame direction in connection with the. shaft Whose speed is to be registered,v double' clutchesl on said shafts respectively, a clockactuated intermediate shaft', cams o n saidintermediate shaft, shifting levers engaged by said cams for locking and releasing said clutches, spur gears on the sleeves of the sliding clutch members, two shafts disposed parallel With-said 'clutch shafts, two spur gears on each of said parallel shafts mesh- .ingwith said clutchfmembe'r spur gears and provided with lateral pins, an 'indicatving arbor, spur gears on-said indicatingarbor provided withA lateral pins engaged atv intervals by the lateral vpins of the spur gears. last mentioned, and -springs for impartingreverse' tension to said gearing.

A 6. Ina speed indicator the ,combination :of an indicating arbor carrying two spur igears, two shafts adjacent to said indicating arbor'and parallel therewith, two spur gearsb on ea'chof said parallel shafts, one -gear'f of eachof said parallel shafts meshing with the same gear on the indicating arbor, said gears` being provided` with laterally pro,-

]ecting pins whereby the spur gears of the parallel'shafts engage at proper intervals the spur gears of the indicating arbor, and

means for actuating the gears' of the parallel shafts in succession.

In testimony, that we claim the forego` ing as our invention, we have signed our 

